Match the description with the key terms. Prompt 1Costs that are charged directly to expense account at the time that the costs are incurred. Answer for prompt 1 Costs that are charged directly to expense account at the time that the costs are incurred. Prompt 2A type of activity that has a causal effect in the occurrence of a particular cost. Answer for prompt 2 A type of activity that has a causal effect in the occurrence of a particular cost. Prompt 3A term describing all three categories of manfacturing cost. Answer for prompt 3 A term describing all three categories of manfacturing cost. Prompt 4The level of sales at which revenue equals operating expense. Answer for prompt 4 The level of sales at which revenue equals operating expense. Prompt 5The amount by which sales revenue exceeds total variable cost expressed as a percentage of sales